Adjustable pin and guide for molders&#39; flasks



Nov. 1, 1927.

G. C. COLEMAN ADJUSTABLE PIN AND GUIDE FOR MOLD EH5 FLASKS Filed Dec. 8,1925 2 Sheets-Sheet l Nov. 1, 1927. 1,647,904

- G. c. COLEMAN ADJUSTABLE PIN AND GUIDE FOR MQLDERS FLASKS Filed060.,8, 1925 2 Sheets-Sheet 2 v G- 6. Coleman.

Patented Nov. 1, leaf].

enonenc; COLEMAN, or mean nanrnannmnii.

T inani- Application filed December a, 1925. serial No. 74,070.

. invention relates to inol ders flasks of the two-p ece type comprlslnga drag" and acope. I

vIn flasksof the type stated, isioustomary toprovide the drag with a pinand the cope witha guide engaging the pinso that after. the lmpresslonis made and thecopeus removed to lift the pattern from the mold, the

cope may be returned to itsidentical original position so that a perfectcasting may be made. As the pins and guides wear by use it will beapparent that eventually the en- .gagement between the pins and guideswill be imperfect. Furthermore, in long use of the flask the drag willeupand so that adjustinent of the pins and guides would be necessary. A

Heretofore it has been the practice to efiec' the adjustment bylnserting pieces of cardboard under the attaching inc-ans ofthe pins orguides, asthe case may be, in order to make a close fit between theguidesand pins. This practice has not been uniformly satisfactorybecause the card-board is likely to be moistened by the moisture used inthe formin of the mold and furthermore the 'HJQELHS for holding the pinsand guides on theflask usually consisting of wood screws are likely towear large holes in the ends of the flask that have to be plugged, andin any event the adjustment complished.

This invention has for its object the provision. of means by which thepin and guide' may be, quickly adjusted without removal from the ends ofthe flask and consists primarily in the provision of plates fixedly seecur-ed to the ends of the cope and drag and having the pins and guidesmounted for adjustment relatively to said plates and providing setscrews to enable a. fine adjustment of the partsfor almost successfuloperation of the flask.

The invention has for a further object the provision of a bearing on thepin to engage the guide that is offset outwardly from the pin to preventwearing of a portion only of the pin and thus forming a rib or ridge onthe pin that would require drilling or filing the pin to remove. V o

The invention will be described in detail hereinafter and will be foundillustrated in the accompanying drawings, in which Figure 1 is an endview of a snap flask is unsatisfactorily ac.

the line 33 of Fig Figure 4-, ahorizontal sectional view min I planeindicated by the lined-Al of Figure l, Figure 5, a similar view on aplane indicated by the line 5-5 of Figure 1, c

Figure 6, a similar view on a plane iDCll' cated by the line 6-6 ofFigure 1,

Figure ,7, a detail sectional view on a plane indicated by the line 7-7of Figure 5,

FigureS, a horizontal sectional view on a plane indicated by the line8-8 of Figure 1, Figuref), a perspective view of the guide, Figure 10, asinilar view of the pin show; ingl the upper portionthereof broken away,an j i Figure 11, a similar view of. the plate and said plate 1 isprovided with bosses .3

having threaded openings 4 ,thc1.'ein,;said bosses seating in. openingsZ) in the ends of t c drag B. Securedto the plate 1, by means of screwbolts 5 engaging through enlarged openings-,6 in the offset flanges 7,is a pin 8 COI1T1Ct(lWlth said flanges 7 by means of armed), aid pin 8being ll-shaped in cross section as shown, and the outer -surfacethereof offset from the remainder of the outer face of the pin as shownat 10 to form a bearing for the guide to be herein after described. Itwill be apparent that the enlarged openings 6 in the flanges 7 providefor a limited adjustment sidewise and up and down of the pin 8relatively to the plate 1 and the drag 2, said adjustment being held bymeans of the screw bolts 5 engaging the. threaded openings 4 in theplate 1 and bosses 3. A further adjustment of the pin relatively to theplate 1 and the drag B,

f wise or up or down as may be required for the proper adjustmentthereof, all adjustments being maintained by tightening on the bolts 5.Secured to the cope A is a plate 12 by means of screws or other drivenfaswtenings 13, and having a boss 14 located at each side of thevertical center of the plate, each of said bosses having a threadedopening 15. Above and below each boss 14 is an enlarged portion 16, eachof which carries a polygonal headed cap screw 17. The guide comprises aV-shaped' portion 18 adapted to slidably engage the bearing surface 10of the pin 8 and having oflset flanges 19 with enlarged openings 20 toreceive bolts 21 engaging the threaded openings 15 in the bosses 14 tosecure the guide on the plate 12, the enlarged openings 20 admitting ofadjustment of the guide sidewise and up and down, and being held inadjusted position by tightening the bolt 21, the inner faces of theflanges 19 being also engaged by the headed set screws 17 to adjust theguide in and out from the plate 12.

From this description it will be apparent that the pins 8 and the guides18 may be accurately adjusted to insure returning the cope in exactlythe same position relatively to the drag for forming the casting afterremoval of the cope from the drag to remove V'the pattern from the mold,21 indicating an outwardly directed flange on the .guide, and flanges 19to form a hand hold for handling the cope What is claimed is l. Guidingmeans for two part molding flasks, comprising a plate adapted to besecured'to one of the members of a flask, bolts engaging said plate, apin, flanges on said pin and mounted on said bolts, set screws engagingsaid flanges and adapted to engage the plate to adjust the position ofsaid pin,

and a guide adapted to be secured to the other member of a flask and toslidably engage the pin.

2. Guiding means for two part molding flasks, comprising a pin adaptedto be adjustably secured to one of the members of a molding flask, aplate adapted to be secured to another member of the flask, said platehaving threaded bosses, bolts engaging said threaded bosses, set screwsengaging said plate, and a guide having a bearing surface adapted toengage said pin, said guide mounted on the bolts aforesaid and engagingsaid set screws.

3. In guiding means for two part molding flasks, a plate to be securedto one part of a flask, a pin, flanges on said pin, bolts secured to theplate, the flanges having openings larger than the diameter of the boltsand adapted to receive said bolts and set screws threadedly engaging theflanges and abutting the plate to adjust the pinrelatively to the plate,the enlarged openings in the flanges also permitting limited adjustmentsof the pin vertically and horizontally.

4. In guiding means for two part molding flasks a plate to be secured toone part of a flas a guide, flanges on said guide, bolts secured to theplate, said flanges having openings larger than the diameter of thebolts and adapted to receive said bolts and set screws threadedlyengaging the plate and abutting the flanges to adjust the guidesrelatively to the plate, the enlarged openings in the flanges permittingadjustments of the guide horizontally and vertically.

'5. Guiding means for two part molding flasks, comprising a plate to besecured to each part of a flask, a pin, flanges on said pin, threadedmembers engaging said flanges and one of the plates to hold the pin onthe plate, set screws threaded into the flanges and engaging the plateto adjust the pin relatively to the plate, a guide, flanges on theguide, threaded members engaging said flanges and the other plate tohold the guide on the plate, and set screws threaded into the plate andengaging the flanges to adjust the guide relatively to the plate.

In testimony whereof I aflix my signature.

GEORGE C. COLEMAN.

